# US 2001/0033941 A1 · Building material compositions

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- Number: US 2001/0033941 A1
- Document ID: US20010033941A1
- Status: Published application
- Kind: A1
- Application number: 09/808,316
- Filed: 2001-03-14
- Published: 2001-10-25
- Earliest claimed: 2000-03-18
- Assignees: Wolff Walsrode AG
- Inventors: Rene Kiesewetter; Hartwig Schlesiger; Martin Morning; Gunter Weber; Werner Lange
- Web page: https://patentgrep.com/patent/US20010033941A1

## CPC

- C04B 24/383: {Cellulose or derivatives thereof}
- C08B 11/193: Mixed ethers, i.e. ethers with two or more different etherifying groups
- Y10T 428/31975: Of cellulosic next to another carbohydrate
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C08B: POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Described is a building material composition prepared from or having added thereto a particulate material selected from particulate polysaccharides or particulate polysaccharide derivatives. The particulate material of the building material composition is prepared by a method comprising: (a) forming a feed composition comprising a member selected from the group consisting of polysaccharides and polysaccharide derivatives, and 35 wt. % to 99 wt. % of water, based on the total weight of the feed composition, wherein said member is at least one of swelled and dissolved in the feed composition; (b) contacting, in a mill, the feed composition with a gas stream, thereby converting simultaneously the water of said feed composition into water vapor, and said member of said feed composition into a solid state form of finely particulate material; (c) separating the particulate material from the gas stream; and (d) optionally drying the particulate material. Examples of building material compositions according to the present invention include tile adhesives and joint fillers.

## Claims

### Claim 1

A building material composition prepared from a particulate material selected from the group consisting of particulate polysaccharides and particulate polysaccharide derivatives, wherein the particulate material is prepared by a method comprising:
(a) forming a feed composition comprising a member selected from the group consisting of polysaccharides and polysaccharide derivatives, and 35 wt. % to 99 wt. % of water, based on the total weight of the feed composition, wherein said member is at least one of swelled and dissolved in the feed composition;
(b) contacting, in a mill, the feed composition with a gas stream, thereby converting simultaneously the water of said feed composition into water vapor, and said member of said feed composition into a solid state form of finely particulate material;
(c) separating the particulate material from the gas stream; and
(d) optionally drying the particulate material.

### Claim 2 (depends on 1)

The building material composition of claim 1 wherein said feed composition comprises from 50 wt. % to 80 wt. % of water, based on the total weight of the feed composition; said mill is a high rotary speed, gas stream impact mill; and said gas stream is a superheated stream of steam comprising a mixture selected from steam and an inert gas, and steam and air, said superheated stream of steam having a steam content of from 40 wt. % to 99 wt. %, based on the total weight of the superheated stream of steam.

### Claim 3 (depends on 1)

The building material composition of claim 1 wherein the polysaccharide derivative is selected from polysaccharide ester, polysaccharide ether and mixtures thereof.

### Claim 4 (depends on 3)

The building material composition of claim 3 wherein the polysaccharide ether is selected from cellulose ether, starch ether, guar ether and mixtures thereof.

### Claim 5 (depends on 3)

The building material composition of claim 3 wherein the polysaccharide ester is selected from cellulose ester, starch ester and mixtures thereof.

### Claim 6 (depends on 1)

The building material composition of claim 1 wherein said building material composition is selected from manually or mechanically applied renders, tile adhesives, floor levelling compositions, jointing fillers, mortars, spraycrete compositions, screeds, cement or lime/sandstone extrudates, filler compositions or distempers, silicate paints, mineral paints and emulsion paints.

### Claim 7 (depends on 1)

The building material composition of claim 1 wherein the particulate material contains, in each case based on the total weight of the particles, less than 5 wt. % with a particle size smaller than 15 μm, less than 2 wt. % with a particle size smaller than 10 μm, and less than 1 wt. % with a particle size smaller than 5 μm.

### Claim 8 (depends on 1)

The building material composition of claim 1 wherein said member is present in said feed composition in an amount totaling from 1 wt. % to 65 wt. %, based on the total weight of the feed composition.

### Claim 9 (depends on 2)

The building material composition of claim 2 wherein said member is present in said feed composition in an amount totaling from 20 wt. % to 50 wt. %, based on the total weight of the feed composition.